Seal-tight preserving jar



H. STONE I SEAL wmn raas'unvme JAR Filed March 1'5. 1922 Patented Jan. 22, 1924;.

UNITED HARBY 'sronn, or wnmourn, MASSACHUSETTS.

SEAL-TIGHT rnnsnnvme JAR;

Application filed March 16, 1922. Serial No. 544,380.

To all whom it may concern:

Be it known that I, HARRY STONE, a citizen of the United States, residing in Veymouth, in the county of Norfolk and the State of Massachusetts, have invented a new and useful Seal-Tight Preserving Jar.

The invention relates to improvements in preserving of foods in air-tight containers.

My way of making such containers airtight is entirely new and unlike all others, and has never been used before. My way makes preserving more reliable and cheaper.

The accompanying drawing is a vertical bi-section of container and cover.

My invention consists of:-

A container A, with a groove Gr, all around on the outside of the upper end, filled with an easy melting substance, as wax. The groove widens with the depth and its walls are corrugated, as indicated by the dots on it. The gradual widening and corrugation make the wax stay immovable, imbedded in the groove, and the cover, firm in the wax.

A cover C6,? whose central part B forms a cup-shaped depression and whose outer edge on its lower side, is carried around with a circular trough T, the outer wall of which extends upwards (FF), and projects somewhat above the cover like a funnel. The lower part of that trough is slightly corrugated (see DD) or roughened for stronger sealing purposes.

When the cover is put on, the cup-shaped part B goes into the mouth of the jar, and the trough T goes into the groove G of the same, and the sides of the jar go into the slide S.

When the preserving is done hot, the jar is filled up to a certain height indicated by a. mark on the jar, so that when the cover is on, it floats on the contents, and its trough only touches the molten wax in the groove, and the jar is closed.

When the jar is thus closed, a small quantity of air is left in the slide S of the cover, which is then inside the closed jar. This air is in a state of slightcompression from the weight of the cover.

Now when the contents: commence to cool and contract, the cover falls in the trough T and sinks deeper into the molten wax of the groove.

It is so arranged that, when the contents have cooled down to the temperature when the wax is about to commence to solidify, the trough settles on the bottom of the groove and the cover becomes stationary. The wax then solidifies and seals the jar.

The contraction of the contents during the solidification of the wax and the vacuum produced therefrom, is supplanted by the expanding air left inside the jar, and no atmospheric pressure on the jar is produced, and the wax solidifies firmly without any disturbance, and the jar becomes tightly sealed.

The extra thickness and weight of the bot tom R of the cup-shaped part of the cover, is meant to overcome the buoyancy of the trough T in the molten wax and also to prevent the cover in its sinking motion, from tilting.

The use of the trough T is that when the cover is to be removed, a little warm water is poured into it, and the cover is loosened at once, and can be lifted with no effort, only the lifting.

The funnel FF makes, in case when too much water is poured in, the surplus run into the hole H. of the cover.

By the warm water process, the cover is removed without in the least disturbing the wax and the impression in it made by the trough, and when preserving is done again in the same jar and done cold, all that is necessary to do is to either heat the cover first and then put it on, or to put the cover in its bed in the wax. and pour a little hot water into the trough, and the cover seals automatically at once.

By the hot water process, the same wax of the jar can always be used without ever diminishing, and with no work and expense.

When preserving is to be done cold. the cover is put on the container, then the trough is filled with hot water that melts the wax in the groove, and on cooling, seals the container.

I claim 1. A cover whose central part is depressed like a shallow cup that goes into the mouth of a container and is floating and sinkable, a trough on the lower side of its outer part, that trough going into a groove filled with wax around the outer side of the mouth of the said container forming a seal tight closure therewith.

2. A cover whose outer part is surrounded with a trough that goes into a groove filled with wax at the mouth of a container, the said cover being sealed and unsealed by the application of hot water into its trough.

3. A cover, a trough around its outer part 4. A cover Whose central part is depressed that goes into a Wax filled groove at the and Whose outer part surrounded with a mouth of a container forming a seal tight trough the outer Wall of said trough project- W closure therewith, and detachable from said ing above the cover forming a funnel around 5 container without deforining the impression the trough.

it formed in the ementing Wax of the groove. HARRY STONE. 

